GRAIN 1 INTRODUCTONCeramic oxide materials remain fragile even at high temperatures, do not virtually undergo plasticity changes, and are characterized by low resistance to a thermal impact.The efficient ways of increasing the strength and crack resistance of the ceramics include the decrease of its grain size along the grain boundary and rein forcement of the ceramics by crystalline particles hav ing similar grain size and composition but differing in morphology or by fibers of different oxide composi tions and whisker single crystals of refractory com pounds.Use of powders of nanosized particles obtained by the sol-gel method in the process of the formation of an alumina matrix with strengthening particles of lan thanum hexaaluminate enables one to decrease the size of the ceramic crystalline grain and substantially reduce the temperature of synthesis and ceramic com posite sintering.Abstract-A ceramic composite material consisting of a corundum matrix filled with layered microparticles of lanthanum hexaaluminate and strengthened by alumina nanofibers with the fiber surface modified by zir conia nanoparticles has been prepared. All the material components have been synthesized using the sol-gel method. The results of studies of the material microstructure by means of scanning electron microscopy (SEM) indicate the homogeneity of the component distribution in the matrix.
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